Tiago Paiva, 28, Cristina Fonseca, 28

Cofounders, Talkdesk

Since its founding in October 2011, TalkDesk has experienced 10x revenue growth year-over-year under the leadership of Tiago Paiva and Cristina Fonseca—making it one of the fastest growing startups in Silicon Valley. It has raised more than $24M over the last two years from Salesforce Ventures, DFJ, Storm Ventures and 500startups.